Nut-lock.



UNITED- sfra'rns PATENT OFFOE;

Specification of Letters Patent.

Patenten oct. 24, 1905.

Application filed March 7, 1905. Serial No. 248,843.

To all whom it may rio/warm Be it known that I, JOHN T. .Bovnfnza citizenof ,the United States, residing at Lewisburg, in the county oi'. Marshall and State of Tennessee, have invented new -and useful Improvements yin Nut-Locks, of which the followingis a specification.

This invention relates to a nut-lock of that` type in which a nut carrying a dog or pawl is fitted to a bolt longitudinally grooved, said grooves engaging the dog or pawl on the nut to prevent the nut from being unintentionally turned in reverse direction, whereby it may become disengaged from the bolt. The nut is also provided with means for disconnecting the dog or pawl from the engaged notch when the nut is to be removed from the bolt.

` Inthe accompanying drawingsforming part of this specification, Figure lis a face vView o-f-the improved nut and its locking means with the grooved holt shown in crosssection. Fig. 2 is a side view of the nut and bolt in operative relation to each other. Figs.

'3,and`4 are perspective views of certain detail' parts. A

Similar reference-numerals indicate correspondilag parts in the different views.

Thee numeral 1 indicates a bolt of welllinown Yfornmfacross the threaded end of which are a plurality of longitudinal grooves 2, having, adepth about that ofthe thread and varying in number as circumstances de- I mand. Each groove 2 is made with a straight -face 3 and a curved face 4, as shown.

The lnut (indicated by 5) may be square, hexagonal. or of other form, in one or both faces of which a radial groove 6 is made extending from the threaded bore of the nut, preferably, to one of its angles or corners, as

Seated in the groove 6 is a dog 8, notched at its lower end to iit the thread of the bolt 1 and extending, preferably, to the edge of the nished with one end turned up,

nut, gradually widening toward they outer end.

A small hole 9 is bored through the dog 8, which when the dog is in position is in line with a hole l() through the nut 5, near the corner 7. The dog is retained in place by means of a pin l1, inserted through the holes 9 and 1"() and having its ends bent, as represented in Fig. 1. The pin is preferably furas in Fig. 4, the other end being bent after inserting it in the nut. The dog 8 is inclined to a radial line from the center of the bolt, so that when the nut is turned in one direction the dog will yield, but on an attempt to rotate it in the opposite direction the toothed end of the dog, which lies in the groove 2, will engage the bolt behind the radial face 3 of the groove and prevent the nut from being turned. When it is desired to remove the nut from the bolt, one end of the pin 11 is straightened or cut off and the remaining portion driven out oi' the nut. The dog is then free to be withdrawn and thenut removed from the bolt.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is-

In a nut-lock, a longitudinallygrooved bolt, combined with a nut having a radial slot in its face extending from the bolt-.hole to its periphery, and a hole through the bolt near said corner, a dog in said slot angularly disposed thereto, and a pin passing through a hole in the dog and the hole in the nut, the ends of said f pin bent to prevent its withdrawal.

In testimony whereof I have affixed my signature in presence of two witnesses.

JOHN T. BOYET.

i/Vitnesses:

HoMER T. HARRIS, OTEY M. REED. 

